Pratt & Whitney
PWA36604 Revision C
Compatibility with Non-Metallic Materials
TEST STANDARD: Hardness Change
To achieve "Conformance", the hardness change shall not exceed the limits of Table 2 when measured in accordance with Materials Control Laboratory Manual Section S-29.
TEST RESULT:
| Material | Allowable Hardness Change |
Test Outcome |
Result |
|---|---|---|---|
| AMS 7267 Silicon Rubber | -10 to +5 |
-2 |
Conforms |
| AMS 7271 Butadiene-Acrylonitrile | 0 to +15 |
-6 |
Does Not Conform |
| AMS 7273 Fluorosilicone | -10 to 0 |
-2 |
Conforms |
| AMS 7276 Fluorocarbon | -5 to +15 |
-4 |
Conforms |
| PWA 407 Rubber | -5 to +5 |
0 |
Conforms |
TEST STANDARD: Volume Change
To achieve "Conformance", the volume change shall not exceed the limits of Table 2 when measured in accordance with Materials Control Laboratory Manual Section S-14.
TEST RESULT:
| Material | Table 2: Allowable Volume Change |
Test Outcome |
Result |
| AMS 7267 Silicone Rubber | 15% max. |
72.8% |
Does not Conform |
| AMS 7271 Butadiene-Acrylonitrile | 15% max. |
78.2% |
Does not Conform |
| AMS 7273 Fluorosilicone | 20% max. |
86.4% |
Does not Conform |
| AMS 7276 Fluorocarbon | 5% max. |
2.8% |
Conforms |
| PWA 407 Rubber | 5% max. |
24.8% |
Does not Conform |